I'm by no mean an authority on this...
In Gold Zone the tokens/coins fall into a hopper for counting. This is triggered by the falling coins which then simply fall straight into a typical coin box below that.
You'd probably need to invest in another hopper system that would have a supply of tokens/coins, but it would need to be able to count them out too.
As you may have already found out, Gold Zone won't "shut up" until the correct amount of tickets have been dispensed. So the trick here is not only driving your "payout" hopper from the game's ticket signal, but sending the info back to the game telling it that the correct amount had been dispensed as well.
Possibly someone with some slot machine know-how might have some insight on this and/or other member may be able to chime in over the next few days too.